Stock and die



Jan. 3, 1933. w, H l STRAW 1,893,308

STOCK AND DIE Filed March 14. 1931 BY im Mw .w

` ATTORNEYS.

Patented Jan. 3, 19,33

AU-Nli'rin) STATES WALTER H. sTnAw, or DEVON, CONNECTICUT sTocK VAnn DIE" Application l'ed March 14, 1931. Serial N0. 522,631'.

My invention relates to new and useful improvements stocks and dies,such as are Vused for thread cutting andy more particu.- larly to4 that class of stocks and dies, includ'- ing dies having a plurality of cutting faces, whereby the same may be adjusted to different positionsl to present different cutting faces, and to be used: in cutting threads on pipes and .bolts of different diameters.

-Anaobject of my invention: is to providev a stock having a pair of'specially designed dies, each having three or more Cutting aces, and to mount the samel for vertical rotary movementiA in the stock., whereby like cutting faces 15 ofthe two dies may be brought to register,

one with the other,.for'joint threading opera'- tions..

A turther` feature of the invention is to provide for horizontal adjustment ofthe said dies whereby they may beset in proper rela.-

. 35 of parts hereinafterl more fully described,

tive: spaced' relation better to accommodate different size pipe, and to cut suitable threads thereon.

Another object of the invention is to provideextended guard flanges' on. the stock, one on each sidey of the dies, better to protect the same front injury during handling, and also to provide ways between which. the, cutting arms of the dies are guided during adjustment andi for supporting, against rotation after being positioned. With: these and other objects in view, the invention resides and consists in the construction and' novel combination and'arrangement illustrated in the accompanying drawing, and pointed out in the claims hereto appended, it being understood that various changes in the form, proportions, size, and minor details of construction within the scope of the stock and dies assembled as for use, the handles being broken away',

- Fig'. 2'is a side elevation, on a slightly enlarged scale, of approximately one half of the stock, and' one of the dies shown in Fig. l.;

- Fig.v 3 is a central vertical longitudinal section of that much of the stock and one of the dies shown ink Fig. 2;

Fig. 4;: shows an enlarged central vertical cross section taken. online 4 4 of Fig.v 1; and

Fig. 5 is a further cross. section, taken on lineV 54-5 of Fig. 1;

It will be noted from theillustrations and description: of this invention. that it includes duplicate sets of die mechanisms,A one in each end portion of the stock, thev opening to receive the pipe to be threaded, being` formed central in this stock intermediate ofthe said mechanisms andA adjacent the operative faces of two thread cutting dies. Therefore, simi.-

lar referencecharacters `will be.y used to designate theduplicate parts in the two end portions of the stock.

10 represents the stockY asa whole, and which as will be seen in Fig. 1.,. is of. an. oval, elongated form and includes acyl-indrical extension 11 on each. end. portion,l having a threaded socket therein for receiving the usual type of attached handles l2. 'lhisy stock also includes parallel, longitudinal spaced apart sides 13 which. are substantially alike in construction. In. thisv connection it will be noted that flanges 1:4.` extend outfrom the top= edge of! the end portions of these sides better to protect thel dies 15 adjustably mounted therebetween. Eachof theser dies are rotatably mounted, upon a bolt 16 forming a pivotal member, intermediate the said sides and flanges and are adapt-edf for both slidable and rotatable adjustment. An open- P ing 17 is formed through the bottomV of each endA portion. of the stockto provide room for the dies. A third or central hole 18 is also provided through the leasey of this stock, in'- termediate of the two saidl openings 17,

through: which the pipe/to be. threaded is positioned for engagement by the dies. rFh'e stock may be further provided with ribs 19 and 20 upon the underside to strengthen and support the same.

ioo

The dies 15, as shown in the drawing are provided with three or more radially disposed thread cutting arms, but they may obviously be provided with a greater number if desired, each of which would be substantially alike, except that the threading dies thereof would be formed larger or smaller Vfor cutting larger or smaller pipe. These arms 21 are of the same thickness as thev hub portions of the dies and there is a contacting surface 22 formed on the hub of the dies intermediate of the said arms, for the engagement of an adjusting screw, as will again be referred to.

23 represents ribs which are formed upon the inner opposite walls'of the before men- -tioned sides adjacent to the central opening in the stock, and includes a lat top bearing surface upon which rests the under surfaces of an arm of each die. Plates 24 are secured to the top edge of the sides immediately above these ribs and like the ribs .form a guide to engage the top surfaces of the arms of the die, so as to hold the latter against turning, but in a manner to permit oflongitudinal movement of the dies to and from each other.V

Each of the sides 13 are provided with elongated openings 25 to receive screw bolts ,16 that are mounted for slidable movement therein and serve to rotatably support the dies, positioned thereon between the said sides. In the rotary adjustment of the dies, they together with the screw bolts, would iirst be moved outward with respect to each other until they ends of their arms cleared the guide plates 24 andwould then be rotated to any desired position, after which the dies would again be set up in position between the guides 23 and 24.

The means for longitudinally adjusting the dies, is alike for each die, and includes a slotted bearing 26 formed on the top side oi the cylindrical extension 11 and bored to receive adjusting screw 27 upon the inner threaded end of which is a tapped shoe 28 for threadable engagement with the screw so thatwith the turning of the screw the shoe will be moved longitudinally against the surface 22 o1c the die in a way to move the same longitudinally between the sides and cause the screw bolt to slide within the slot of the sides. In this respect, it will be noted that each .screw 27 is provided with a pin 30 adjacent one end and adapted to be moved with the longitudinal movement of the screw through slot 29 so that after passing through the slot they will ride, with a turn of the screw, upon the inner end of the bearing and serve to hold the screw against outward longitudinal movement, thereby forcing the shoe and the die with which it engages, in. When it is desiredto withdraw the dies, it is done by turning the screws back so that the pins will register with the slots whichpermits of a quick sliding movement of the screws and dies, until the annular ange upon the rshoes are brought to bear against the end of the bearing.

Having thus described my invention, what I claim and desire to obtain by Letters Patent, is:

1. A thread cutting stock and die comprising a stock having an opening therethrough and oppositely disposedl handles, spaced apartwparallel side walls extending i'rom one face of the stock on opposite sides of said opening and having aligned slots therein, pivotal members adj ustably mounted in said slots, a pair of multiple point dies rotatably mounted upon the pivotal members between the said sides, a shoe seated against the side or" each of said dies, the said stock including a slotted bearing on each end, a screw threadably engaging each of said shoes and rotatably and slidably mounted in theslotted bearings to adjust the dies toward each other, l the said screws carrying a projected pin adapted to slide through the slot and to engage the end of the bearing for quick adjustment of the dies.

2. A thread cutting stock and die comprising a stock having a pipe supporting opening ltherethrough and oppositely disposed handles, opposed parallel side walls extended froml one side of the stock and adjacent said opening, opposed aligned slots in said side walls, pivotal members mounted for sliding movement in said slots, a pair of multiple point dies rotatably mounted upon the pivotal members between said sides and including relatively long extended threading arms having parallel side and edge portions, guides in opposite side portions of the stock adjacent said opening to receive the arms of the dies and to hold the same in alignment in against both rotary and sidewise movement, and means for adjusting said pivotal members and dies to and from each other to position the threaded arms of the dies inthe said guides. n `3. A thread cutting stock and die compris- 4i1`0 ing a stock having a pipe receiving opening therethrough and oppositely disposed 'hand les, parallel side walls extended romone side of the stock and adjacent said opening, opposed slots in said side walls, pivotal memr bers mounted for sliding movement in Said slots, a pair of multiple point threading dies rotatably mounted on the pivotal members between said sides and including extended arms having parallel side and edge portions, aligned sockets formed between said side walls to receive and hold the arms of the dies in alignment against both rotary and sidewise movement, and means for adjusting said pivotal members and dies to and from each other to move the threading arms of the dies in and out-of the said sockets.

4. A thread cutting stock and die comprising a stock having a pipe receiving opening therethrough, parallel sidewalls extended 130 from the face of the stock adjacent the open ing and having longitudinal guide ribs along their inner opposed faces, plates secured to said sides to form aligned sockets, opposed slots formed in said side walls, pivotal members mounted for sliding movement in said slots, a pair of multiple point threading dies rotatably mounted Von the pivotal members between said sides and including relatively long arms to engage said aligned sockets formed between said side Walls and pivotal members to hold the arms of the dies against both rotary and sidewise movement, and means for adjusting said pivotal members and dies to and from each other to position the threading arms of the dies inthe said sockets. n

Signed -at Bridgeport, in the county of Fairfield and State of Connecticut, this 10th day of March, A. D. 1931. y

WALTER H. STRAW. 

